Plate-clamp.



Patented Dec. 21, 1915.

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L. MIDDLEDITCH.

PLATE CLAMP.

APPLICATION FILED APR. 29, 1913.

@X3i memes elevation of Fig. 4. Fig. 6 is a view` similar PLATE-GL/A'MP.

Specification of Letters Patent. .i

Patented Dec. 21 1915.

application inea April 29, 1913. serial no. 764,320.

To all whom it may concern:

Be it known that I, LYMAN MIDDLEDITCH, a citizen of the'United States,and a resident of New York city, in the county of New York and StateofNew York, have invented certain new and useful Improvements inPlate-Clamps, ofwhich the following is a specificatie Y The presentinvention relates to a plate clamp of the type more particularly knownas a register hook for printing machines, and has for its objectsimplicity of construction .and the production of a propelling means formoving the clamp in the groove of the plate carrying member which willnot be adversely affected when clogged by ink.

The invention consists of the features set forth in the accompanyingclaims, a preferred embodiment of which is disclosed in the accompanyingdescription and drawings.

In the said drawings: Figure '1 is a plan view of a plate carryingmember with a.

plate clamped in position by means of clamps embodying the invention.Fig. 2 is a sectional view on the line 2-.2 of Fig. 1. Fig. 3 is adetail sectional viewon the line 3-3 of Fig. 1 with the plate removed.Fig. 4 is a plan view of the clamp with the parts in position to bedropped into the groove of the plate carrying member. Fig. k5 is a'-side to Fig. 4 but with the parts in position to engage a plate. Fig. 7is a vertical sectional view of the .parts shown in Fig. 5. Fig. 8 is asectional detail view showing the screw of the clamp in engagement withthe threads of the groove.

`- `Similar characters of reference indicate corresponding parts in theseveral views.

The plate carrying member may be either a cylinder, or, as here shown,-a flat bed 10 provided with diagonally extending grooves 11 havingoblique threads 12 on one side and provided with an undercut portion 13.

14 is the plate Vand 15 the plate clamp.

yThe plate clamp consists in part of ya supporting member 16-adapted toslide in the groove.

. 17 is a rotatable plate'clamping member mounted in the supportingmember 16 by means of the stem 18 provided, at its lower end, in linewith the undercut portion 13, with a head 19 of a length substantiallyequal in one direction to the width of the groove 11, and long enough inthe other direction to extend into the undercut portion 13 of the groove11 and o'set circumferentially with relation to the clamping member 17as shown. Thus the plate clamping member 17 and head 19 can be turnediin unison. l

1 When it is desired to place the clamp in` the groove the member 17 isturned intov the position shown in Fig. 4, whichA brings the head 19into line with the supporting member, and' vafter the clamp is placed inthe groove, the member 17 lis turned a part of a revolution, say 45, ineither direction, whereby the said member 17 is brought into position toclamp the plate and the headv 19 is caused to extend into the undercutportion 13 as shown in Figs. 1, 3, 6 and 7.

The supporting member 16 further carries the rotatably and obliquelymounted screw 20 which is adapted to engage with the oblique threads 12.The shoulder 21 and pin 22 keep the screwv 20 from'movement lengthwiseof its axis. When the member 17 is turned into the position shown inFig. 6 one or the otherof the two openings 23 will be over the screw 20and will permit a wrench to be inserted in the socket 24 of the screw,which, when rotated, propels the supporting member along the groove 1'1.Should ink have accumulated in the threads caked ink out, and said inkwill not prevent adjustment of the clamp. This is a great advantage overthefus'ual gears employed in the teeth of which the ink accumulates andprevents the parts from moving.

When it is desired to insert the clampinto the groove, the member 17 isturned into the position shown in F ig. 4, as previouslyv explained.Then the clamp vcan be inserted into the groove by turning thescrew 20in a clockwise direction, -or screw. 20 and threads 12 can be engaged,and the screw slid downward to the right (Fig. 8). The member 17 is nowgiven a 45o turn so as to bring the head 19 into the undercut portion13. The screw 20 can then be rotated to slide the clamp along thegroove.

What is claimed, is:

1. A plate carrying member having a groove provided with an undercutportion, a plate clampl comprising a supporting mem- `12, the rotationof the screw 20 will cut the ber adapted to be engaged in the groove,

of a length substantially equal in one direction to the width of thegroove and long enough in the other direction to extend into the-undercut portion of the groove, whereby when the plateclamping memberis turned into position to engage the plate the head will' extend intothe undercut portion of the rotatable in unison with the plate clampingmember, whereby a partial revolution ofthe plate clamping member willcause the head to extend into the undercut portion of the groove.

3. A plate carrying member having a groove provided with an undercutportion, 'a plate clamp comprising a supportlng mem ber adapted to beengaged in the groove, and a rotatable plate clamping member hav Aing ahead in line with" the undercut por tion and rotatable in unisonwith theplate clamping member, and means for propelling the supportingl memberin the groove. v

4. A plate carrying member having a groove provided with threads on oneside, a plate clamp, and a screw rotatably and obliquely mounted in saidengaging with said threads. v

51A plate carrying member having a groove provided withthreads on oneside, a plate clamp comprising, a supporting member, a plate clampingmember rotatably engaged in 'the supporting member, and-a screwrotatably and obliquely mounted in said supporting member andengagingwith said threads.

6. A plate carrying member having a groove provided with threads on oneside and with an undercut-portion belowl said groove, a plate clampcomprising, a supporting member adapted to slide in -the groove, arotatable plate clamping member 11a-ving a head in line with theundercut portion andy rotatable 'in' unis'on 'with the plate clampingmember, and a screw rotatably and obliquely mounted in said supportingmember and engaging with said threads.

7. A plate carrying member having a groove provided With threads, aplate clamp, a screw rotatably and obliquely mountedv4 in said plateclamp adapted to engage said threads, and means for preventing movementof the screwv lengthwise of its axis. I

8. Ay plate carrying member having a groove provided with an'undercut'portion, a plate clamp comprising a supporting member adapted to beengaged in the groove, and a rotatable plate clamping member havingplate clamp and straight oblique a head in line `with, the yundercutportion of a length substantially equal in one direction to the width ofthe groove and long enough in the other direction to extend into theundercut portion of the groove, whereby when the plate clamping memberis turned into position to engage the plate the head will extend intothe `undercut portion of the groove and when the plate clamping memberis turned in position to disengage .the

plate the said head will be out of the under- :A

cut portion and wholly within the groove.

" 9. Al plate carrying member having a groove provided with an undercutportion,r y a plate clamp comprising a supporting mem- 1.0. A platecarrying memberhavin a.

groove provided with anundercut portlon,

v a plate clamp' comprising a supporting member adapted to be engaged inthe groove, and

a rotatable plate clamping member having a head in line with theundercut portionand rotatable in unison with the plate clamping member,and means for propelling the supporting member in the groove.

11. A plate' carrying memberA having a groove provided `with 'threads onone side and with an undercut portion below `said f groove, a plateclamp comprising a supporting member adapted to slide in the groove, arotatable plate clamping member having a head in line with the undercutportion and rotatable in unison vwith the plate clamping member, and aviscrew rotatable and completely mounted'lnlsaid supporting member andengaging with said threads.

12. A plate carrying member having a groove provided with an undercutportion,

a plate clamp comprising a supporting member adapted to' be engaged inthe groove, a

rotatable member mounted in said supporting member, a plate clampingmember at one end of said rotatable member, anda head in line' with theundercut, portion and of a length substantially equal in one direction'to the width of the groove and long enough Y in the other direction toextend into the undercut portion of the groove on the other'end I ofsaid rotatable member.

Signed at New York city, in the county of New York and State of. NewYork this 26th day of April A. D. 1913.v

LYMAN MIDDLEDITCH. Witnesses:

AXEL V; BEEKEN, LAURA E. SMITH.

